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MongoDB\\Database::selectCollection()
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.. default-domain:: mongodb
.. contents:: On this page
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Definition
----------
.. phpmethod:: MongoDB\\Database::selectCollection()
Selects a collection within the database.
.. code-block:: php
function selectCollection($collectionName, array $options = []): MongoDB\Collection
This method has the following parameters:
.. include:: /includes/apiargs/MongoDBDatabase-method-selectCollection-param.rst
The ``$options`` parameter supports the following options:
.. include:: /includes/apiargs/MongoDBDatabase-method-selectCollection-option.rst
Return Values
-------------
A :phpclass:`MongoDB\\Collection` object.
Errors/Exceptions
-----------------
.. include:: /includes/extracts/error-invalidargumentexception.rst
Behavior
--------
The selected collection inherits options such as read preference and type
mapping from the :phpclass:`Database <MongoDB\\Database>` object. Options may be
overridden via the ``$options`` parameter.
Example
-------
The following example selects the ``users`` collection in the ``test`` database:
.. code-block:: php
<?php
$db = (new MongoDB\Client)->test;
$collection = $db->selectCollection('users');
The following example selects the ``users`` collection in the ``test``
database with a custom read preference:
.. code-block:: php
<?php
$db = (new MongoDB\Client)->test;
$users = $db->selectCollection(
'users',
[
'readPreference' => new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_SECONDARY),
]
);
See Also
--------
- :phpmethod:`MongoDB\\Database::__get()`
- :phpmethod:`MongoDB\\Client::selectCollection()`
- :phpmethod:`MongoDB\\Collection::__construct()`
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